If you saw our review of the 11.6-inch Taichi 21, you'll know that its unusual dual-screen design had a pretty bad impact on battery life. ASUS is taking another crack at the whip, however, this time with the 13.3-inch Taichi that is finally shipping after a major hold-up in the US and promises a big boost to stamina -- a max of seven hours of use rather than five. If this claim stands up to scrutiny, the Ultrabook's other advantages should come back into play: namely the presence of pen or multi-touch input on the outer screen, excellent viewing angles and speakers, and a range of configurations based on either a Core i5 or i7 with SSD storage. We have no idea how pricing will compare to the $1,300 base of the 11-incher and the Taichi 31 hasn't appeared at any major retailers yet -- i.e., it still isn't quite as "available" as ASUS claims -- but we'll bring you an update when that changes.